Failures in line extensions come in all shapes and sizes. They include forgettable items like light whiskeys and more notable failures like Pepsi Clear and McDonald’s pizza, which made little sense to consumers and had almost nothing in common with the image or benefits of the parent brands. I would argue that even some of the most publicized line-extension products, such as Miller Lite and Diet Coke, have done considerable long-term volume and market-share damage to their parent products. It is not inconceivable that Coca-Cola and Miller might have even larger corporate consumer franchises today had they invested in new brands rather than in product-line extensions.